Good luck. Starting a business is tough, very tough. I hope you succeed and that Dave will still be your friend.
Wellll... It's not quite as bad as all of that. It is a lot of work to start your first business, but the rewards are well worth the effort. The toughest part is shaking off the employee mindset, and realizing that you are now in charge. Success or failure is based on how motivated you are. It takes a lot of self-disipline.
The good news is that each new business you start after the first one is much easier.
Congrats on having the courage to give it a try! I'm looking forward to having your beer!